NX AC not cooling well

[Tigershark]

i have cleaned all the filters and screens blown out the condenser rinsed off the radiator still not getting a reading less than 70 coming out the vents. Any suggestions ? Compressor is kicking on . Usually runs vey cold but not anymore. Also haven’t seen any water draining from the line not sure if that is part of it or separate issue
thanks for any advice

 

[ROUSTABOUT]

I don't know your tractor but I know systems. You could have a bad heater valve that isn't closing. If your heater core is by your evaporator core it will have to fight the heat. I put a valve by the engine and closed it off and fixed that problem.

You say your compressor is kicking on. Have you watched the clutch to make sure it is engaging? It should engage and stay engaged for a little while. If it kicks on and kicks off your system may be low of refrigerant. Just add some if you have a good system that worked fine last year. If your compressor stays on for 30 seconds or more you have enough charge. So that makes me think your heater may be the problem. It could also be an air diverter problem. But hot weather is here and with a glass cab, AC has to work.

Tighten every fitting, or make sure they're tight.

 

[MinnesotaEric]

i have cleaned all the filters and screens blown out the condenser rinsed off the radiator still not getting a reading less than 70 coming out the vents. Any suggestions ? Compressor is kicking on . Usually runs vey cold but not anymore. Also haven’t seen any water draining from the line not sure if that is part of it or separate issue
thanks for any advice

I bet you have rodents/or material that has blown into your tractor cab top and the water drain is clogged, or like has happened once with my tractor, the blend air door cable popped off up in the HVAC system under the cab top leaving the blend door stuck. Alternatively, the high and low side Schraders are right around the upper radiator hose, just above the thermostat and you could screw in an AC manifold set and check pressures (do this only if you know what you're doing).

I use a Radiator Genie for cleaning out the screens and cooling radiators as well as for blowing out air filters. Hands down the Radiator Genie is better than my regular blower wands I use as a mechanic.

See this video for cab removal.

 

[Tigershark]

Eric, already checked no blockage from rodents keep a pretty clean barn Nothing is draining because it’s not condensing ltemp is in the low 70s coming out of the vents

 

[MinnesotaEric]

Eric, already checked no blockage from rodents keep a pretty clean barn Nothing is draining because it’s not condensing ltemp is in the low 70s coming out of the vents

Check my edit. since I remembered that it happened on my tractor, I added that one of the cables may have popped off that controls your HVAC controls.

 

[Tigershark]

Thanks did the blend air door cable come off in the removal of the cab ?

 

[MinnesotaEric]

Thanks did the blend air door cable come off in the removal of the cab ?

It just popped of the end of the cable at the d blend air door. It was child’s play to put it back on and confirm that it wasn’t going to come off again. The cable on my tractor was the hot cold bend air door. The knob had started binding then loose feeling and then just loose.

 

[Tigershark]

Got it thanks. Checked the Low side this evening at it was in the low range of normal. Gave it a 1/2 second squirt and ordered the genie tool. Hoping maybe it is still dirty will at least try that this week. belt seemed tight running out of options it’s in the 90s and wheat harvest starts in a couple of weeks so I need some cool temps I’ve got to plant my farm right after we combine the wheat.

 

[ROUSTABOUT]

Is there an electric thermocouple involved? It will be in the top. I replaced one of those and it started blowing cold. The only way I thought that was the problem was by checking the rest of the system.

 

[Tigershark]

Don't think there is but there is something called a thermocon might be the same thing that prevent the evaporator from freezing maybe it's messed up or a bad expansion valve